1Piece~10Pcs M4~M20 SUS304 Hydraulic Zerk Grease Nipple Fittings Lubricating Nipples 45° 90° and Straight Coarse and Fine Thread
https://www.vogueparade.com/shopping/EN/200282142/1/1005003701951449/1piece10pcs-m4m20-sus304-hydraulic-zerk-grease-nipple-fittings-lubricating-nipples-45-90-and-straight-coarse-and-fine-thread//