https://www.amazon.com/dp/B0D6XWXDKV?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4&th=1 This is what I use for loading pens; I use a 31g 1” version for venting. They will both work fine with filters. (I use the 1.5” to get to the bottom of the vial so I don’t lose anything, since I am not as good as some people draining an inverted vial.)

@ratstudies https://a.co/d/03AamvV5 and https://a.co/d/0i7ltP0b

This is a vendor review submitted by ratstudies on PeptideCritic.com. Rating: (5/5) Review Ordered a couple vials of Klow for research and they shipped quickly. EZ Peptides has affordable prices and usually has coupons so a win/win all around. Shop EZ Peptides Read the full review on EZ Peptides' page Discuss this review, share your own experiences, or ask questions about the vendor. Please keep discussions respectful and factual.