See the product image below. This product does not include a push button stop valve, nor do any of the Hamilton® GASTIGHT® removable needle (RN) syringe models.
A push button valve of this type is sold under Product No. 22285, but this valve is intended for use with the Hamilton® GASTIGHT® PTFE Luer Lock (TLL) syringes. The equivalent syringe with the TLL termination is sold under Product No. 20916. The needles compatible with this syringe and push button stop valve are sold under Product No. 21747 (KEL-F fluorocarbon polymer needle hub) or Product No. 21746 (metal needle hub).