Delta Injector Syringe Retractable Ballpoint Pen Casing Weighted Needle Listening Needle Adrenaline

It is recommended that all parts be printed with a 0.2 nozzle; using a 0.4 nozzle may lead to assembly jamming or unusable parts. To avoid material changes for each layer, the parts are pre-plated in the print file for the most material-efficient and fast printing.

For the internal spring and refill, you can purchase them according to the given specifications, or the simplest way is to buy a common M&G GP1008 ballpoint pen and remove the spring and refill for damage-free installation. (Taobao reference links are at the bottom of this article)

Installation is simple; just assemble them in the order of tip-spring-refill-tail-pusher. When installing the pusher, observe the tail's groove, slide it along the groove channel, push down, then slightly rotate the pusher counter-clockwise. The spring will push the pusher into the correct groove. Next, press it all the way down again and slightly rotate clockwise to secure the refill for normal writing.

It is normal for there to be slight jamming during the first installation; just pull and push it a few times. Additionally, if you have lubricant, you can spray it at the connection point between the pusher and the pen barrel to make the pressing action smoother. (Refer to the image below)

If anyone needs refills of other styles, feel free to make a wish in the comment section! If you have other models you like, you can also make a wish!

Attached are Taobao links for materials, no benefits have been received, for reference only

Reference ballpoint pen: 【Taobao】Ten times compensation for fakes https://e.tb.cn/h.7uocxHnh3p5Gnkq?tk=4fH8UkUoFFl HU293 「M&G Push-Action Gel Pen GP1008 Bullet Tip 0.5mm Black Pen for Study Daily Writing Study-Specific Business Signature Pen Ballpoint Pen Ink Blue Black Red Pen Water Pen Refill Stationery Supplies」Click the link to open directly or search on Taobao to open directly

Available refill: 【Taobao】7-day no-reason return https://e.tb.cn/h.7Gw2P1WH6RM3vBV?tk=FWePUkk8N73 HU293 「Push-action Gel Pen Refill G5 Student Use Black 0.5 Bullet Tip Black Pen Replacement Refill K35 Bullet Tip Student Supplies」Click the link to open directly or search on Taobao to open directly

Spring: 【Taobao】7-day no-reason return https://e.tb.cn/h.7uvbCmgwwyuYXZ5?tk=zFTPUkkQXha CZ007 「Ballpoint Pen Refill Spring Inner Core Compression Gel Pen Push-Action Return Small Spring Steel Wire 0.4 Phone Data Cable Spring」Click the link to open directly or search on Taobao to open directly