You may purchase Catalyst measuring syringes from us, or on your own, and these are useful when dealing with small amounts of resin and catalyst. For example, when using 1 quart of Polyester resin, it's easy to overshoot the amount of MEKP needed, causing an overreaction leading to undesirable smoke/steam from the resin, and a higher temperature / exothermic reaction. This may also burn what you are working on. Syringes make it easy to get reliable amounts of MEKP for the resin to avoid this.