I think it's 15mm ? Probably too small for 20mm see pictures for details. 3 tanks. One has a broken barrel. Not suitable for children
Chandelier Crystal Prisms Pendants Pink 15mm/20mm/30mm/40mm Faceted Crystal Glass Balls Chandelier Parts Home Decoration(15mm 200pcs)
Optical Glass Lens 15mm X 15mm Optical Cube Prism Beam Combination
4 x Anti Vibration Rubber Bobbin Mounts 15mm D x 15mm Long M4 male car boat
uxcell Arcade Joystick 15mm Shaft Extender Control Rod Extension Stainless Steel Classic Fighting Game Machine DIY Parts 4Pcs
sourcing map Arcade Joystick 15mm Shaft Extender Control Rod Extension Stainless Steel Classic Fighting Game Machine DIY Parts 4Pcs
10Pcs 15mm Multicolor Acrylic Cube Dice Beads Six Sides Portable Table Games Toy
