Piston head for 20mL
https://www.scientificgear.shop/shop/k20-040-5700-48-k551-5101-piston-head-for-20ml-29766
https://www.scientificgear.shop/web/image/product.template/29766/image_1920?unique=c13c026
K20-040-5700-48 (K551-5101): Piston head for 20mL
