select productID from products inner join prodprops on prodprops.product=products.productID
where (prodprops.prop=1 and prodprops.value between '0' and '300')
and (prodprops.prop=3 and prodprops.value='G')
and products.type = 1

/* 
If I get rid of one of the "(prodprops.prop= and prodprops.value=)" lines I get results, how can I get results checking against both? 
*/

products table

productID
type
price

prodprops table

ppropID
prop
value
product