Dual flush conversion kits work on normal toilets. Currently I have only front handle kits. If you have a normal toilet with water tank attached on top of the bowl and the handle is on the front not on the side of the tank, you are good to go.
MSRP's for STS-12, and WP40 are $12.99, and $19.99. WTS30-51 was discontinued and replaced with WTS153. We will update the information as soon as we receive the kits from Watos Corea. Buyer pays shipping via USPS Priority mail.
Let me know how many units you need, I will email you the invoice and PayPal instruction.